Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.939561
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9395613219hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingJW
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_brussels
- Resource type
- ibm quantum hardware
- Processor family
- Eagle r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-02-24T23:13:29+01:00
- Wall time (s)
- 206
Molecular system
- Charge
- 0
- Multiplicity
- 1
- Basis
- STO-3G
- Active space
- 2e,2o
- Active electrons
- 2
- Spatial orbitals
- 2
- Geometry units
- angstrom
Circuit
- Logical qubits
- 4
- Physical qubits
- —
- Parameters
- —
- Depth
- 96
- Two-qubit gates
- 48
- Hamiltonian terms
- —
Dataset publication
Associated articles
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware submitted to Quantum Science and Technology
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware DOI 10.48550/arXiv.2604.11478 arXiv 2604.11478 published preprint
Compute access
- Fraunhofer Quantum Now and EQeS · IBM Quantum · allocation: Fraunhofer Quantum Now
Optimization trajectory
28 recorded objective evaluations. Charts use cumulative time so convergence cost remains comparable across calculations.
| Attempt | Outcome | Energy (Ha) | Elapsed (s) | Quantum (s) | Parameters |
|---|---|---|---|---|---|
| 1 | succeeded | -0.8692693853 | 6.14579 | 2 | — |
| 2 | succeeded | -0.8668876950 | 6.47639 | 2 | — |
| 3 | succeeded | -0.8165930655 | 6.93189 | 3 | — |
| 4 | succeeded | -0.8754807305 | 6.52112 | 3 | — |
| 5 | succeeded | -0.8785869086 | 10.0936 | 6 | — |
| 6 | succeeded | -0.8839070409 | 11.7614 | 8 | — |
| 7 | succeeded | -0.9023954124 | 9.08409 | 5 | — |
| 8 | succeeded | -0.8527445117 | 11.0976 | 7 | — |
| 9 | succeeded | -0.8899152900 | 8.14357 | 4 | — |
| 10 | succeeded | -0.8883940555 | 9.44002 | 5 | — |
| 11 | succeeded | -0.9261165476 | 7.47811 | 3 | — |
| 12 | succeeded | -0.8837866380 | 8.91209 | 5 | — |
| 13 | succeeded | -0.8891094563 | 6.28714 | 2 | — |
| 14 | succeeded | -0.8866069730 | 5.87384 | 2 | — |
| 15 | succeeded | -0.8801647183 | 6.7809 | 2 | — |
| 16 | succeeded | -0.8894971075 | 6.47243 | 2 | — |
| 17 | succeeded | -0.8791904910 | 6.53401 | 2 | — |
| 18 | succeeded | -0.8521992758 | 6.50008 | 2 | — |
| 19 | succeeded | -0.8886171276 | 6.09457 | 2 | — |
| 20 | succeeded | -0.9073215876 | 6.45979 | 2 | — |
| 21 | succeeded | -0.8919756384 | 6.20952 | 2 | — |
| 22 | succeeded | -0.9395613219 | 6.52959 | 2 | — |
| 23 | succeeded | -0.9268366145 | 6.52242 | 2 | — |
| 24 | succeeded | -0.8764460534 | 6.77787 | 2 | — |
| 25 | succeeded | -0.9004682596 | 6.52648 | 2 | — |
| 26 | succeeded | -0.8936509780 | 6.78469 | 2 | — |
| 27 | succeeded | -0.8887351343 | 6.5699 | 2 | — |
| 28 | succeeded | -0.9028482413 | 6.69701 | 2 | — |